Series boiler



Dec; 31, 41929. D. YJACOBUS 1,

' SERIES BOILER Origihal Filed April 16, 1918 s Sheets-Sheet 1 INVENTbR.

V i x E] BY ;%L4W I v ATTORNEYS.

' Dec. 31, 1929. D. s. JACOBUS 1,741,701

SERIES BOILER Original Filed Aprii 1a, 1918 s sheds-sheet 2 IN V EN 710R.

AWW

ATTORNEYS.

Dec. 3 1, 1929. 5, JACQBUS 1,741,701

SERIES BOILER I original Filed April 16, 1918 5 sheets-Sheet a o i Q -1 INVENTOR.

fiwi TTORNEYS.

Patented Dec. 31, 1929 D STATES DAVID S. JAGOBUS, OF JER sEY cI'rY, NEW JERSEY, ASSIGNOR TO THE BALBGOCK & wI'L- oox COMPANY, or BAYONNE, NEW JERsEY, a CORPORATION OF NEW JERSEY SERIES BOILER Application filed April 16, 1918, Serial No. 228,827. Renewed May 26 1928.

Fig. 1 is a sectional side elevation of my improved boiler showing oil-firing and arranged for practical use as regards the pre ferred general proportions of headers and tubes, although the view is partially diaferred arrangement of the tubes next to the.

side walls; Fig. 6 is a horizontal sectional view showing a modified form of the header boxes formed in sections; Fig. 7 is a partial vertical sectional View of headers and tube connections of Fig. 6. a

In Figure 1 I show a series boiler arranged to be heated by an oil furnace and of a gen eral form which experiments have indicated as preferable, as regards the general proportions of the tubes and headers. The boiler tubes are so arranged and the feed of water thereto is such that the hot gases first contact with evaporating tubes in which there is most steam and least water and the gases leave tubes into which the coldest water is entering, thus involving countercurrent flow for the tubes of the series that contain no steam and in which water is being heated to the boiling point. The boiler portion is divided into two sections B with the superheater C between them, so that the hot gases from the furnace contact with the portion of the boiler or evaporating tubes, thence over further boiler tubes, and thence over.

the economizer tubes A before reaching the uptake 7 The oil burners 66 may be spaced along the front of the furnace, a part of which is broken away in the drawing, or any form of stoker or handfired grate may be used.

In this form the feed water in the pipe 8 enters the rear header box 2 and thence flows upwardly through the economizer tubes 3, and thence downwardly to the header box 67. From this header box the water then flows upwardly through tubes '68 into the header 69. The headers 69 are at a slightly higher level than the headers 67, and the tubes 68 are spaced alternately with reference to the downtake tubes leading into the header box 67. The succeeding arrangement is similar, the downfiow tubes being spaced alternately with the upflow tubes of each box until the header 70 is reached. From this header the steam and water flow through tubes 71 which have Wider bends bridging the superheater tubes: and entering the header 7 2. From the header 72 the steam and water flow progressively through the boiler tubes and finally enter the header 9 From this header the steam and water pass through a seriesof pipe connections 73 into a cross pipe 74. The water is separated from the steam in this cross pipe, and the water flows through a number of small pipe connections 75 through the valved connection 76, and to the tank 12 From the separating pipe 7a the steam, from which the greater part or all of the water has been separated, passes upwardly through the small pipes 77 into the superheater header 78. From this header the steam passes through the superheater tubes into the superheater header 74 from which it is taken away.

The preferred method of supporting the tubes in the headers is illustrated in Figure 2, which also shows the arrangement of the downfiow and upflow tubes for the headers. As shown, the support consists of cast iron pieces 79 held in place by bolts 80 and secured in turn by the beams 81. The supporting pieces 79 may interfere with the removal of the fittings opposite the ends of the tubes, if it is necessary to remove those adjacent to these supports. In such case, the bolts for one of the pieces 79 are removed with the piece, after which the fittings can be more readily manipulated. Each header is supported by more than one of the pieces 79 so that one piece may be removed without interfering with the header support. If necessary the headers can be jacked upwardly in order to replace the supporting pieces 79.

- In Figure 3 I show a top plan view of some of the tubes and portions of the headers of the boiler of Figure 1. It will be noted that the vertical portions of the tubes are so spaced that they are in staggered relation in reference to the direction of flow of the gases, which flow is indicated by the arrows. The plane of the legs of a given tube thus makes an angle with the direction of the gas flow. Preferably, alternate tubes connected to a given header are connected to headers on opposite sides of the given header, the planes of the legs of alternate tubes making an angle with each other. The straight portions 3 and 3 of a given tube, such as 3 in Fig. 3, which are connected to two adjacent headers 52 and 2, are spaced far enough apart with reference to the direction of the flow of the gases to make the straight portions 3 and 3 of two other tubes 3 and 3 which are connected to the same headers 2 and 2", come between the straight portions 3" and 3 of the given tube. This allows of bends of a larger radius to be used in the tubes than would be the case if the straight portions of the given tube were so connected that no straight portions of another tube came between the straight portions of the given tube with reference to the direction of the flow of the gases. Putting the matter another way, the straight portions of a given tube, for example, the straight portions 8" and 3 of the tube 3, are made to enter holes 3 and 3 in the adjacent headers, which are farther apart than the holes 3 and 3 to which the tube could be connected.

In Figure 4 I illustrate one arrangement of the header boxes and means for support ing the cores, which are preferably used in the U-tubes. In this form the screw plugs fitting in the header hand holes opposite the tubes are provided with projecting plug portions 81 fitting in the tubular cores 82, the U-tubes being shown at 83.

In Figure 5 I show the arrangement of the tubes 84 which are adjacent to the side walls of the boiler. It will be noticed that these tubes 84 which are near the sides are introduced in a special way, so that instead of conducting the steam and water from one header box to the next succeeding box, they bridge one box and conduct the steam and water into the second succeeding box. This involves the use of tubes bent to a wider radius along the sides of the boiler than the intermediate tubes. The advantage of using these special tubes along the sides is that a uniform staggered arrangement of the vertical portions of all tubes may be obtained from side to side of the boiler, whereas without the special tubes some of the tubes near the sides of the boiler must be omitted, giving irregular tube spacing at the sides. Cores of a larger diameter than the others may be used in the special tubes which come at the sides of the boiler, to avoid a greater flow of steam through the special tubes than through the other tubes.

In Figure 6, I show the use of a number of header boxes placed end to end. Each line of header boxes marked 85 is made up of three sections with the joints indicated at 86, while each line of the header boxes 87, alternating with the first lines, is made up of four sections, the joints being indicated at 88. The joints in line 85 are staggered relative to the joints in line 87, thus leading to an even distribution of the steam throughout the width of the boiler.

In Figure 7 I show one of the joints be- I tween the ends of the line of headers.

IV hat I claim and desire to secure by Let ters Patent of the United States is 1. In a fluid heater, a series of substantially parallel fluid containing compartments and return tubes having their ends connected thereto, successive tubes connected to a given compartment being connected alternately to adjacent compartments on opposite sides of the given compartment, the planes of successive tubes making an angle with each other, and means for directing hot gases over said tubes.

2. In a fluid heater, a series of substantially parallel fluid ccntaining compartments and return tubes having their ends connected thereto, the plane of the legs of a given tube making an angle with the direction of gas flow and with the next succeeding tube connected to the same compartment, the parts being constructed and arranged to cause the straight portions of the tubes to enter holes in the adjacent compartments that are farther apart than the nearest holes that could be used, and successive tubes connected to a given compartment being connected to adjacent compartments on opposite sides of the given compartment, and means for directing hot gases over said tubes.

3. In a fluid heater, a'series of substantially parallel fluid containing compartments and return tubes having their ends connected thereto, successive tubes connected to a given compartment being connected alternately to adjacent compartments on opposite sides of the given compartment, the planes of successive tubes making an angle with each other, the straight portions of a given tube being spaced apart so as to make straight portions of two adjacent tubes come between the straight portions of the given tube with reference to the direction of the flow of the gases, and means for directing the gases over the tubes.

I. In a fluid heater, a gas passage, fiuid containin g compartments, return tubes connected thereto and extending across said gas passage, the plane of two successive legs of a given tube making an angle with the direction of gas flow and with the plane of two successive legs of the next succeeding tube on each side of said given tube that is spaced transversely with respect to said given tube across the gas passage, the first end of the given tube and one end of each of said succeeding tubes being connected to one and the same compartment, the other end of said given tube being connected to a compartment different from that to which the said first end of said given tube is connected and the other ends of said next succeeding tubes being also connected to a compartment diflerent from the one to which the said first end of said given tube is connected.

5. In a fluid heater, a gas passage, fluid containing compartments, return tubes connected thereto and extending across said gas passage, the plane of two successive legs of a given tube making an angle with the direction of gas flow and with the plane of two successive legs of the next succeeding tube on each side of said given tube that is spaced transversely with respect to said given tube across the gas passage, the first end of the given tube and one end of each of said succeeding tubes being connected to one and the same compartment, the other end of said given tube being connected to a compartment clifferent from that to which the said first end of said given tube is connected and the other ends of said next succeeding tubes being also connected to a compartment different from the one to which the said first end of said given tube is connected, the straight portions of a given tube being spaced apart so as to make a straight portion of a succeeding tube come between the straight portions of the given tube with reference to the direction of the flow of gases.

6. In a fluid heater, a series of lines of substantially parallel header boxes and return tubes having their ends connected thereto, successive tubes connected to a given box being connected alternately to adjacent boxes on opposite sides of the given box, the planes of successive tubes making an angle with each other, and means for directing hot gases over said tubes.

7. In a fluid heater, a series of lines of substantially parallel header boxes with adjacent boxes staggered with respect to each other as viewed from the ends of said boxes and return tubes having their ends connected thereto, successive tubes connected to a given box being connected alternately to adjacent boxes on opposite sides of the given box, the planes of successive tubes making an angle with each other, and means for directing hot gases over said tubes.

8. In a fluid heater, a series of substantially parallel fluid containing compartments and return tubes having their ends connected thereto, some of the successive tubes connected to a given compartment being connected alternately to adjacent compartments on opposite sides of the given compartment and a tube at one end of said compartment being connected to said compartment and a compartment farther away therefrom than either adjacent compartment.

9. In a fluid heater, a series of substantially parallel fluid containing compartments and return tubes having their ends connected thereto, some of the successive tubes connected to a given compartment being connected alternately to adjacent compartments on opposite sides of the given compartment and a tube at one end of said compartment being connected to said compartment and a compartment farther away therefrom than either adjacent compartment, the planes of said tubes making angles with the direction of gas flow through said heater.

10. In a fluid heater, a series of substantially parallel fluid containing compartments and return tubes having their ends connected thereto, some of the successive tubes connected to a given compartment being connected alternately to adjacent compartments on opposite sides of the given compartment and a tube at one end of said compartment being connected to said compartment and a compartment farther away therefrom than either adjacent compartment, successive tubes in the direction of gas flow being staggered.

11. In a fluid heater, a series of header boxes, tubes connected to said header boxes, some of the successive tubes connected to given header box being connected to adjacent header boxes on opposite sides of the given box and a tube at one end of said box being connected to said box and a box farther away therefrom than either adjacent box, said last named tube having a smaller flow area therethrough than said first named tubes.

In testimony whereof I have hereunto signed my name.

DAVID S. JAGOBUS. 

